PNGSaver.java

/*
 * polycasso - Cubism Artwork generator
 * Copyright 2009-2017 MeBigFatGuy.com
 * Copyright 2009-2017 Dave Brosius
 * Inspired by work by Roger Alsing
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and limitations
 * under the License.
 */
package com.mebigfatguy.polycasso;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;

import javax.imageio.ImageIO;

/**
 * generates a png file from the set of polygons
 */
public class PNGSaver implements Saver {

    /**
     * saves the set of polygons in a png file
     *
     * @param fileName
     *            the name of the file to write to
     * @param imageSize
     *            the dimension of the image
     * @param data
     *            the polygons to draw
     */
    @Override
    public void save(String fileName, Dimension imageSize, PolygonData[] data) throws IOException {

        try (BufferedOutputStream bos = new BufferedOutputStream(Files.newOutputStream(Paths.get(fileName)))) {

            BufferedImage image = new BufferedImage(imageSize.width, imageSize.height, BufferedImage.TYPE_4BYTE_ABGR);
            Graphics2D g2d = (Graphics2D) image.getGraphics();
            try {
                g2d.setColor(Color.BLACK);
                g2d.fillRect(0, 0, imageSize.width, imageSize.height);

                for (PolygonData pd : data) {
                    pd.draw(g2d);
                }

                ImageIO.write(image, "png", bos);
            } finally {
                g2d.dispose();
            }
        }
    }

}